Slate picker



Pas. 21, 1928. 1,659,899

' F. R. SMITH SLATE PICKER Filed July 8, 1924 I lNVENTOF 5 5-2ML4( I V W/ TNESS Patented Feb. 21, 1928. i i I UNITEQ STATES PATENT OFFICE.

FREDERICK E. SMITH, F PLAINS, PENNSYLVANIA.

I g I SLATE PICKER.

Application filed July 8, 1924. Serial No. 724,769.

My invention relates to slate picking pan, or other washing means, of a coal Washmeans for effecting the removal of slate and lng apparatus; other material, consisting of relatively fiat Fig. 2 is a view in side elevation looking particles, from coal in the washing and sepaat the lower side of Fig. 1; and

5 ration of coal from slate and other like im- F 1g. is a view taken on the line 33of purities. The coal and the slate are sub- Fig. v jected to the action of water andby reason Referring to thedrawing: 1 and 2 desigof the fact that the specific gravity of the nate the opposite sides of a chute having a slate is greater than that of the coal the bottom comprising plates 3 and 4 which are 19 former is discharged from the coal washing provided with perforations, as shown. The

apparatus at a lower point,:while the latter, upper portion of the plate 4: is provided that is the coal, is discharged from a higher with an unperforated flange-like portion 5 point of the apparatus. However, it not inby means of which it is connected to the frequently happens that some portion of forward end of a jig pan, not shown. The slate remains in the coal which is discharged sides 1 and 2 are likewise provided with rear and it is desirable that such portion be reend portions 6 and? which are adapted for moved. It is therefore a' general object of connection with the forwardend portions of the present invention to provide means the sides of said jig pan.

whereby such slate as may have remained in the present construction the inter-me 20 intermixed with the coal which is discharged diate portion of the bottom of the chute from the washing apparatus shall be picked comprises fiat bars 10 one end of each of out and separated therefrom. which is provided with projecting cylindri- 7 Another object of the invention is to procal portions 11 which constitute trunnions.- vide a slate picking or removing means These portions extend through openings 12 25 which is adapted for application to and to 111 the side 1 of the chute and are journaled be embodied within the chute through which therein. The opposite ends of the fiat plates the coal is discharged from the jig pan of or bars 10 are provided with outwardly proa coal jig structure such as that shown in jecting portions 15 which extend through the patent to Henry V. Falker No. 1,055,731 openings 16 through a plate 17 secured upon 30 granted March 11, 1913. the outer side of the side 2 of the chute by Another object of the invention is to promeans of rivets 18. The plate 17 overlies vide slate picking or separating means of and covers up an opening 20 formed by cutthe character indicated with means whereby ting away a portion of the lower edge of the same may be readily adjusted to adapt it the side 2 as best shown in Fig. 3 of'the 35 to the conditions which may be: met in pracdrawing. The purpose of employing the ti plate or bar 17 is to facilitate the assembling To these and other ends my invention of the parts which make up the structure. comprehends the construction as hereinafter The projections 16 are provided with handescribed in detail, particularly pointed out dle-like portions 21 which extend substan- 40 in the claim and as illustrated in the actially at right angles thereto in parallel recompanying drawing in which I have illuslation'to the side 2 of the chute. The upper trated one convenient form of embodiment ends of these handle-like portions 21 extend of the same. It will be understood that my through openings 22 in the horizontal flange invention is susceptible of embodiment in 23 of an angle member the other vertical 45 other forms of construction than that shown flange 24 of which is secured to the upper and that various changes in the details edge portion of the side 2 by means of bolts 2 thereof may be made within the scope of the 25 which extend through the said side and claim without departing from the said inthrough slots 26 which are provided in and. Vention. extend longitudinally of the said flange 24.

50 In the drawing: v The angle member is adapted to be clamped Fig. 1 is a top plan view of a chute emin any posit-ion to which it may be adjusted bodylng my invention which is adapted for by means of nuts 27 upon the bolts 25. By 7 receiving and discharging coal from a jig adjusting the handle-like portions 21 the positioned so as to lie in a common or single plane or they may be adjusted so as to provide relatively long and narrow openings between the edges thereof as indicated in Figs. 2 and 3 of the drawing. The'upper edge of the uppermost or right-hand plate or bar 10 is separated from the lower edge of the perforated plate 4, as indicated at 30. This opening as well as the openings between the adjacent edges of the several plates should. be of widths to permit the passage therethrough of the particles of slate which are of flat formation but not of sufiicient width to permit of the passage therethrough of the coal which is being discharged through the said chute.

The purpose of the present construction is to provide means adapted for embodiment within and as a part of a chute structure whereby such slate as, may not have been separated outof the coal during the jigging and washing operation may be separated therefrom during its discharge through the chute from the jig pan and before it is sent out'into commerce for use.

It will be seen that by my invention I have provided a simple structure which may be installed economically for the purpose of eifecting a final and a substantially complete separation of slate and other impurities in the form of relatively fiat particles from coal before it is put into the market for use.

having openings therethrough other, each of which bars is provided with projections at its opposite ends, one of the sides of the saidchute being provided with openings therethrough through which the projections of the said bars at one side of the said chute bottom extend, a portion ofv the lower edge of the opposite side of the said chute being cut away, a plate secured to said side over the opening formed by cutting away the said lower edge portion, said plate I I through which the projections at the opposite ends of said bars extend, extensions projecting from the last named projections and extending in parallel relation to the adjacent side of the said chute and means having adjustable con-' nection with the said side and with the said extensions whereby the latter may be acl justed to effect rotatable adjustment of the said bars. r

In testimony-that I claim the foregoing as my invention I have hereunto signed .my name this 12th'day of March, A." D. 1924.

FREDERICK B. SMITH. 

